There are so many good certification are available on .net. you can choose according to your choice and interest. It covers a
variety of areas, from C# application development and aspects of the
.NET object hierarchy to database application development with Visual
Basic .NET using ADO .NET. Students who take advantage of the program
will acquire significant hands-on experience with XML and XSLT.
here are some good links which will give you the idea about certification courses as well training and books